class word_dict:
    letter_num_1, letter_num_2 = 0, 0

    word_dict = {'a': 0, 'b': 1, 'c': 2, 'd': 3, 'e': 4, 'f': 5, 'g': 6,
                 'h': 7, 'i': 8, 'j': 9, 'k': 10, 'l': 11, 'm': 12, 'n': 13,
                   'o': 14, 'p': 15, 'q': 16, 'r': 17, 's': 18, 't': 19,
                   'u': 20, 'v': 21, 'w': 22, 'x': 23, 'y': 24, 'z': 25,
                 0: 'a', 1: 'b', 2: 'c', 3: 'd', 4: 'e', 5: 'f', 6: 'g',
                 7: 'h', 8: 'i', 9: 'j', 10: 'k', 11: 'l', 12: 'm', 13: 'n',
                 14: 'o', 15: 'p', 16: 'q', 17: 'r', 18: 's', 19: 't',
                 20: 'u', 21: 'v', 22: 'w', 23: 'x', 24: 'y', 25: 'z'}

    def letter_changing(self: int, input_num: int):
        while input_num >= 26:
            input_num = input_num - 26
        while input_num < 0:
            input_num = input_num + 26
        return input_num

